WO1995021296A1 - Procede de production de papier - Google Patents

Procede de production de papier Download PDF

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Publication number
WO1995021296A1
WO1995021296A1 PCT/GB1995/000232 GB9500232W WO9521296A1 WO 1995021296 A1 WO1995021296 A1 WO 1995021296A1 GB 9500232 W GB9500232 W GB 9500232W WO 9521296 A1 WO9521296 A1 WO 9521296A1
Authority
WO
WIPO (PCT)
Prior art keywords
groups
suspension
sulphonic acid
psr
process according
Prior art date
Application number
PCT/GB1995/000232
Other languages
English (en)
Inventor
Brian Frederic Satterfield
John Oliver Stockwell
Original Assignee
Allied Colloids Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to PL95310979A priority Critical patent/PL180024B1/pl
Priority to EP95907733A priority patent/EP0693146B1/fr
Priority to BR9505772A priority patent/BR9505772A/pt
Priority to AU15831/95A priority patent/AU701663B2/en
Priority to DK95907733T priority patent/DK0693146T3/da
Priority to MX9504150A priority patent/MX9504150A/es
Priority to DE69506799T priority patent/DE69506799T2/de
Priority to JP52047195A priority patent/JP3681070B2/ja
Application filed by Allied Colloids Limited filed Critical Allied Colloids Limited
Priority to NZ279258A priority patent/NZ279258A/en
Priority to CA002159593A priority patent/CA2159593C/fr
Publication of WO1995021296A1 publication Critical patent/WO1995021296A1/fr
Priority to FI954677A priority patent/FI954677A0/fi
Priority to NO19953936A priority patent/NO319019B1/no
Priority to GR990400425T priority patent/GR3029339T3/el

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/06—Paper forming aids
    • D21H21/10—Retention agents or drainage improvers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/47—Condensation polymers of aldehydes or ketones
    • D21H17/48—Condensation polymers of aldehydes or ketones with phenols
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/53—Polyethers; Polyesters
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/76—Processes or apparatus for adding material to the pulp or to the paper characterised by choice of auxiliary compounds which are added separately from at least one other compound, e.g. to improve the incorporation of the latter or to obtain an enhanced combined effect
    • D21H23/765—Addition of all compounds to the pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • D21H17/29—Starch cationic
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
    • D21H17/375—Poly(meth)acrylamide
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
    • D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
    • D21H17/45—Nitrogen-containing groups
    • D21H17/455—Nitrogen-containing groups comprising tertiary amine or being at least partially quaternised
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D21H17/56—Polyamines; Polyimines; Polyester-imides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—Oxides, hydroxides or carbonates

Definitions

  • PROCESS OF MAKING PAPER It is standard practice to make paper by a process comprising forming a cellulosic suspension, adding a retention system to the suspension, draining the suspension through a screen to form a sheet, and drying the sheet in conventional manner to make the desired paper, which can be a paper board.
  • the retention system is included in the suspension before drainage in order to improve retention of fibre and/or filler.
  • the retention system can consist of a single addition of polymer in which event the polymer is usually a synthetic polymer of high molecular weight, or the retention system can comprise sequential addition of different retention aids.
  • the retention aid Before adding a high molecular weight polymer or other retention aid it is known to include low molecular weight polymer, for instance as a wet strength resin or as a pitch control additive. The molecular weight of such polymers is generally too low to give useful retention.
  • a common retention system consists of high molecular weight (for instance intrinsic viscosity above 4dl/g) cationic polymer formed from ethylenically unsaturated monomers including, for instance, 10 to 30 mol% cationic monomer.
  • retention systems are known in which high molecular weight non-ionic polymer or high molecular weight anionic polymer is used.
  • EP-A-017353 we describe a retention system for use in "dirty" pulps (having a high cationic demand) comprising bentonite followed by a substantially non-ionic polymer which can be polyethylene oxide or, for instance, polyacrylamide optionally containing small amounts of anionic or cationic groups.
  • a retention system for use in "dirty" pulps (having a high cationic demand) comprising bentonite followed by a substantially non-ionic polymer which can be polyethylene oxide or, for instance, polyacrylamide optionally containing small amounts of anionic or cationic groups.
  • one process comprises adding bentonite to the "dirty" suspension and then adding polyethylene oxide.
  • Another retention system that is sometimes used for dirty suspensions comprises adding water-soluble phenol formaldehyde resin followed by polyethylene oxide, the amount of phenylformaldehyde resin (on a dry basis) generally being substantially greater than the amount of polyethylene oxide.
  • the materials are relatively inexpensive and that on some dirty pulps it gives very satisfactory retention at low doses.
  • it suffers from the disadvantage that it frequently gives rather poor results (even on a dirty suspension having high cationic demand) and the reason for the wide variation in results is not fully understood.
  • Another disadvantage is that the phenol formaldehyde resin tends to become increasingly cross linked with time, with the result that performance may deteriorate upon storage of the resin.
  • Another disadvantage is that the molecular weight of water- soluble phenol formaldehyde resins has to be rather low in order to maintain solubility. Increase in the molecular weight of a retention aid would expected to improve retention, but performance may deteriorate when using phenol formaldehyde resins because of reduced solubility.
  • phenol- or napthol- sulphur resins or of phenol- or napthol- formaldehyde resins, followed by polyethylene oxide is described in U.S. 4,070,236.
  • the phenol formaldehyde resins are exemplified by commercial products and it is stated that the preferred products are formed by condensation of formaldehyde with m-xylene sulphonic acid and dihydroxy diphenyl sulphone.
  • the commercial products that are named are described as synthetic tanning agents.
  • the molar proportions used for making the phenol formaldehyde resins are not described but we believe that the commercial tanning agents were probably made using an amount of the sulphone such as to provide about half the recurring groups in the polymer.
  • a process of making paper comprises forming a cellulosic suspension, adding retention aid to the suspension, draining the suspension through a screen to form a sheet, and drying the sheet and in this process we add to the suspension a retention system comprising polyethylene oxide and a greater amount (dry weight) of a phenolsulphone-for aldehyde resin (PSR resin) consisting essentially of recurring units of the formula -CH 2 -X- wherein (a) 65 to 95% of the groups X are di(hydroxy- phenyl) sulphone groups, (b) 5 to 35% of the groups X are selected from hydroxy phenyl sulphonic acid groups (i.e., groups which contain at least one hydroxy-substituted phenyl ring and . at least one sulphonic group) and naphthalene sulphonic acid groups and (c) 0 to 10% of the groups X are other aromatic groups.
  • PSR resin phenolsulphone-for aldehyde resin
  • the amount of groups (a) is preferably 70 or 75% to 95%.
  • the amount of groups (b) is preferably 5 to 25%.
  • Groups (c) do not usually contribute usefully to the performance of the PSR and so the amount of them is usually low, often zero.
  • all the groups (b) can be naphthalene sulphonic acid groups, usually at least half, and preferably all the groups (b) are hydroxy-phenyl sulphonic acid groups. Any groups (c) are usually hydroxy-phenyl groups, most usually phenol or a substituted phenol.
  • groups (b) are di(hydroxy-phenyl) sulphone groups which are substituted by sulphonic acid, these groups will count also as groups (a) .
  • groups (a) Preferably at least half the groups (a) , and usually at least three quarters and most preferably all the groups (a) , are free of sulphonic acid groups.
  • the preferred PSR resins include 65 to 95% (and most preferably 70 or 75% to 90 or 95%) di(hydroxy-phenyl) sulphone groups free of sulphonic acid groups and 5 to 30% (usually 5 or 10% to 25) hydroxy-phenyl sulphonic acid groups free of di(hydroxy-phenyl) sulphone groups and 0 to 10% other hydroxyl-phenyl groups.
  • the methylene linking groups in the PSR resins are usually ortho to a phenolic hydroxyl group and suitable PSR resins can be represented as having the following recurring groups.
  • the various rings may be optionally substituted and usually have the sulphone group and the group R para to the phenolic hydroxyl group, as discussed below.
  • Increasing the total amount of sulphone groups (that contain 2 phenyl rings) relative to the amount of groups that contain a single phenyl ring can increase the molecular weight that is attainable without insolubilisation due to cross linking since it increases the tendency for the methylene links to be on different phenyl groups.
  • Increasing the amount of sulphonic acid substituted groups tends to increase the solubility of the compound, but if the proportion is too high (and especially if the sulphonic compound is naphthalene sulphonic acid or a onocyclic sulphonic acid) may depress molecular weight.
  • Preferred compounds for use in the invention have the formula shown above wherein x is 0.75 to 0.95, y is 0.05 to
  • the characteristic content of sulphonic groups permits the compounds to be made easily to a particularly suitable combination of high molecular weight and solubility.
  • the molecular weight of the compounds is preferably such that they have the solution viscosity mentioned below.
  • the sulphonic acid groups may be in the form of free acid or water soluble (usually alkali metal) salt or blend thereof, depending on the desired solubility and the conditions of use.
  • the PSR resin may be made by condensing 1 mole of the selected phenolic material or blend of materials with formaldehyde in the presence of an alkaline catalyst.
  • the amount of formaldehyde should normally be at least 0.7 moles, generally at least 0.8 and most preferably at least 0.9 moles.
  • the speed of the reaction increases, and the control of the reaction becomes more difficult, as the amount of formaldehyde increases and so generally it is desirable that the amount of formaldehyde should not be significantly above stoichiometric.
  • the phenolic material that is used generally consists of (A) a di(hydroxyphenyl)sulphone, (B) a sulphonic acid selected from phenol sulphonic acids and sulphonated di(hydroxyphenyl)sulphones (and sometimes naphthalene sulphonic acid) and (C) 0 to 10% of a phenol other than a or b, wherein the weight ratio a:b is selected to give the desired ratio of groups (a) : (b) .
  • the ratio is in the range 25:1 to 1:10 although it is also possible to form the condensate solely from the sulphone (a) , optionally with 0-10% by weight (c) .
  • the ratio is in the range 20:1 to 1:1.5 and best results are generally obtained when it is in the range 20:1 to 1:1, often 10:1 to 2:1 or 3:1.
  • Component (A) is free of sulphonic acid groups. It is generally preferred that at least 50% by weight of component B is free of di(hydroxyphenyl)sulphone groups and preferably all of component B is provided by a phenol sulphonic acid.
  • phenolic material (C) can be included but is generally omitted.
  • the preferred PSR resins are made by condensing formaldehyde (generally in an amount of around 0.9 to 1 mole) with 1 mole of a blend formed of 95 to 65 parts by weight (preferably 95 to 80 or 75 parts by weight) di(hydroxyphenyl)sulphone that is free of sulphonic acid groups with 5 to 35 (preferably 5 to 25 or 30) parts by weight of a phenol sulphonic acid.
  • the di(hydroxy-phenyl)sulphone is generally a symmetrical compound in which each phenyl ring is substituted by hydroxy at a position para to the sulphone group, but other compounds of this type that can be used include those wherein either or both of the hydroxy groups is at an ortho or meta position to the sulphone group and those wherein there are non-interfering substituents elsewhere in the ring.
  • the hydroxyphenyl sulphonic acid generally has the hydroxyl group of the phenyl in a position para to the sulphonic acid group, but other compounds of this type that can be used include those wherein the sulphonic acid group is ortho or meta to the hydroxyl group and those wherein there are other non-interfering substituents elsewhere in the ring.
  • phenyls that can be included are unsubstituted phenyls and phenyl substituted by non-interfering groups.
  • Typical non-interfering groups may be included in any of the phenyl rings include, for instance, alkyl groups such as methyl.
  • the molecular weight of the condensate is preferably such that a 40% aqueous solution of the full sodium salt of the condensate has a solution viscosity of at least 50 cps, generally at least 200 cps and typically up to 1000 cps or more, when measured by a Brookfield viscometer using spindle 1 at 20 rp and 20°C.
  • Suitable PSR resins having a content of phenol sulphonic acid of above 25% are available from Allied Colloids Limited under the tradenames Alcofix SX and Alguard NS.
  • the polyethylene oxide preferably has molecular weight of at least about 1 million, and most preferably about 1.5 or 2 million, for instance up to 5 million or more.
  • the PSR is preferably incorporated first into the suspension, for instance by mixing a solution of the PSR into the suspension. This allows the PSR to adsorb onto the fibres of the suspension. The polyethylene oxide is then added to the suspension as a solution, whereupon visible flocculation occurs. We believe this flocculation is probably due to hydrogen bonding interaction between the PSR and the polyethylene oxide.
  • the ratio by dry weight of the PSR to the polyethylene oxide is usually at least 1:1 and is preferably at least 1.5:1. Although it may be as high as, for instance, 6:1 it is generally unnecessary for it to be above about 3:1.
  • the two retention aids can be added to the suspension simultaneously or, preferably, sequentially. Best results are generally obtained when the PSR is added first and, after it is thoroughly distributed through the suspension and after it is absorbed onto the fibres, the PEO is added. Although useful retention can be obtained using the PSR in combinations with relatively low amounts of PEO, such as 50g/ton (grams dry weight PEO per ton dry weight suspension) the invention is of particular importance when the overall dosage is being made with a view to obtaining the highest possible retention value. In general, the retention value increases as the amount of polyethylene oxide increases and so the advantage of using a PSR is particularly significant at higher dosages of polyethylene oxide, for instance at least 100 or 200 g/t and generally at least 300 or 400 g/t.
  • the amount of polyethylene oxide is generally below 2,000, and preferably below 1,500 g/t. Best results in the invention are obtained using 200 to 1,000, preferably 300 or 400 to 1,000, g/t and the PSR in an amount of 1.5 to 3 times the amount of polyethylene oxide, the PSR preferably having been absorbed onto the cellulosic fibres before the addition of polyethylene oxide.
  • the use of the combined retention system is of particular value when the suspension is relatively dirty and contains lignins and anionic trash.
  • the dirty suspension can be dirty due to the inclusion of a significant amount, for instance at least 25% and usually at least 50% dry weight, of a dirty pulp such as a pulp selected from ground wood, the ⁇ nomechanical pulp, de-inked pulp, and recycled pulp.
  • a dirty pulp such as a pulp selected from ground wood, the ⁇ nomechanical pulp, de-inked pulp, and recycled pulp.
  • Many paper mills now operate on a partially or wholly closed system with extensive recycling of white water, in which event the suspension may be relatively dirty even though it is made wholly or mainly from clean pulps such as unbleached/or bleached hardwood or softwood pulps, and the invention is of value in these closed mills.
  • the invention is of value wherever the suspension, in the absence of the retention system, has a cationic demand of at least 0.05 meq/1, usually at least 0.1 and most usually at least 0.03 meq/1 and up to, for instance 0.6 meq/1.
  • cationic demand is the amount of polydiallyl dimethyl ammonium chloride homopolymer (POLYDADMAC) having intrinsic viscosity about ldl/g that has to be titrated into the suspension to obtain a point of zero charge when measuring streaming current potential using Mutek PCD 02 instrument.
  • POLYDADMAC polydiallyl dimethyl ammonium chloride homopolymer
  • the suspension may be substantially unfilled, for instance containing not more than about 5% or 10% by weight (based on the dry weight of the suspension) filler. Some or all of the filler may be introduced as a result of some or all of the suspension being derived from de-inked pulp or broke, or may be filled as a result of the deliberate addition of inorganic filler typically in amounts of from 10 to 60% by weight.
  • the invention is of particular value in suspensions that are unfilled or only contain a small amount of filler and in the production of paper that is substantially unfilled or only contains a small amount of filler.
  • the invention is preferably used in processes for making paper containing not more than 15% and generally not more than 10% by weight filler or which is unfilled.
  • the invention is of value in the manufacture of paper of speciality ground woods and in the manufacture of newsprint.
  • the suspension may, before addition of the retention aids, have had conventional additives included in it such as bentonite, cationic starch, low molecular weight cationic polymers and other polymers for use as, for instance, dry or wet strength resins.
  • conventional additives included in it such as bentonite, cationic starch, low molecular weight cationic polymers and other polymers for use as, for instance, dry or wet strength resins.
  • the invention is of particular value when the suspension is dirty, it can also be used in clean suspensions, for instance made from unbleached and/or bleached hardwood or softwood pulps and having low cationic demand (below 0.1 and usually below 0.05 meq/1) provided the suspension has a pH such that the PSR has appropriate solubility in that suspension. It may be desirable to select the proportion of sulphonic groups having regard to the pH of the suspension so as to obtain a level of solubility that gives optimum performance. It appears to be desirable that the solubility should not be too high and preferably the PSR and PEO, when mixed as aqueous solutions in the desired proportions at the pH of the suspension, form a somewhat gelatinous rheology.
  • the invention is of particular value in acidic suspensions, for instance pH4 to 6 or higher and especially 4.2 to 5.5, since reducing the pH can improve performance whereas it normally worsens performance when using conventional phenol formaldehyde instead of the PSR.
  • PFR is a conventional phenol formaldehyde retention resin (Cascophen PR511)
  • A is a PSR formed from formaldehyde with p-pdi (hydroxyl phenyl) sulphone and p-phenol sulphonic acid in a weight ratio of 50:50
  • B is a PSR formed from the same materials but with a weight ratio of 70:30 PEO is Equip polyethylene oxide C is Mimosa tannin
  • Example 1 When testing the retention of 1% groundwood stock using PEO with phenol formaldehyde resin and product A, with the stock at different pH values, the % retention values obtained were:

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Abstract

Procédé de production de papier consistant à former une suspension cellulosique, à lui ajouter un agent de rétention, à filtrer la suspension à travers un tamis pour former une feuille, puis à sécher la feuille. On ajoute à la suspension un système de rétention comportant du poly(oxyde d'éthylène) et une quantité supérieure (en poids sec) d'une résine phénol-sulfone-formol (résine PSR) consistant essentiellement en unités récurrentes de formule -CH2 -X- où (a): de 65 à 95 % des groupes X sont du type di(hydroxy-phényle) sulfone, (b) 5 à 35 % des groupes X sont sélectionnés parmi des groupes d'acide hydroxy-phényle sulfonique (c'est à dire, des groupes contenant au moins un cycle phényle à substitution hydroxy et au moins un groupe sulfonique) et des groupes d'acide naphtalène sulfonique, et (c) 0 à 10 % des groupes X sont d'autres groupes aromatiques.
PCT/GB1995/000232 1994-02-04 1995-02-06 Procede de production de papier WO1995021296A1 (fr)

Priority Applications (13)

Application Number Priority Date Filing Date Title
DE69506799T DE69506799T2 (de) 1994-02-04 1995-02-06 Verfahren zur herstellung von papier
BR9505772A BR9505772A (pt) 1994-02-04 1995-02-06 Processo de fabricaçao de papel
AU15831/95A AU701663B2 (en) 1994-02-04 1995-02-06 Process of making paper
DK95907733T DK0693146T3 (da) 1994-02-04 1995-02-06 Fremgangsmåde til fremstilling af papir
MX9504150A MX9504150A (es) 1994-02-04 1995-02-06 Procedimiento para producir papel.
PL95310979A PL180024B1 (en) 1994-02-04 1995-02-06 Paper-making process
JP52047195A JP3681070B2 (ja) 1994-02-04 1995-02-06 製紙方法
EP95907733A EP0693146B1 (fr) 1994-02-04 1995-02-06 Procede de production de papier
NZ279258A NZ279258A (en) 1994-02-04 1995-02-06 Papermaking process involving adding a retention aid and then adding a polyethylene oxide and a phenolsulphone/formaldehyde condensate
CA002159593A CA2159593C (fr) 1994-02-04 1995-02-06 Procede de production de papier
FI954677A FI954677A0 (fi) 1994-02-04 1995-10-02 Paperinvalmistusprosessi
NO19953936A NO319019B1 (no) 1994-02-04 1995-10-03 Prosess for fremstilling av papir
GR990400425T GR3029339T3 (en) 1994-02-04 1999-02-10 Process of making paper

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/191,930 1994-02-04
US08/191,930 US5538596A (en) 1994-02-04 1994-02-04 Process of making paper

Publications (1)

Publication Number Publication Date
WO1995021296A1 true WO1995021296A1 (fr) 1995-08-10

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Application Number Title Priority Date Filing Date
PCT/GB1995/000232 WO1995021296A1 (fr) 1994-02-04 1995-02-06 Procede de production de papier

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US (1) US5538596A (fr)
EP (1) EP0693146B1 (fr)
JP (1) JP3681070B2 (fr)
KR (1) KR100346559B1 (fr)
AT (1) ATE174981T1 (fr)
AU (1) AU701663B2 (fr)
BR (1) BR9505772A (fr)
CA (1) CA2159593C (fr)
DE (1) DE69506799T2 (fr)
DK (1) DK0693146T3 (fr)
ES (1) ES2125597T3 (fr)
FI (1) FI954677A0 (fr)
GR (1) GR3029339T3 (fr)
MX (1) MX9504150A (fr)
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WO1997030222A1 (fr) * 1996-02-13 1997-08-21 Allied Colloids Limited Production de papier charge et compositions utilisables dans ce papier
WO1999002775A1 (fr) * 1997-07-07 1999-01-21 Kemira Kemi Ab Agent de retention
US6048438A (en) * 1995-11-08 2000-04-11 Nalco Chemical Company Method to enhance the performance of polymers and copolymers of acrylamide as flocculants and retention aids
US6123856A (en) * 1998-01-09 2000-09-26 Ciba Specialty Chemicals Water Treatments Limited Dewatering of sludges
US6284099B1 (en) 1996-02-23 2001-09-04 Ciba Specialty Chemicals Water Treatments Limited Sizing of paper
US6818100B2 (en) 2000-08-07 2004-11-16 Akzo Nobel N.V. Process for sizing paper
US7303654B2 (en) 2002-11-19 2007-12-04 Akzo Nobel N.V. Cellulosic product and process for its production
EP2402503A1 (fr) 2010-06-30 2012-01-04 Akzo Nobel Chemicals International B.V. Procédé de production d'un produit cellulosique
US8425723B2 (en) 2007-04-05 2013-04-23 Akzo Nobel N.V. Process for improving optical properties of paper

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US6074527A (en) 1994-06-29 2000-06-13 Kimberly-Clark Worldwide, Inc. Production of soft paper products from coarse cellulosic fibers
US6001218A (en) 1994-06-29 1999-12-14 Kimberly-Clark Worldwide, Inc. Production of soft paper products from old newspaper
US5582681A (en) 1994-06-29 1996-12-10 Kimberly-Clark Corporation Production of soft paper products from old newspaper
US5824192A (en) * 1996-05-24 1998-10-20 E. Qu. I. P. International Inc. Method and adjuvant composition to improve retention of particles on a wire screen
US6296736B1 (en) 1997-10-30 2001-10-02 Kimberly-Clark Worldwide, Inc. Process for modifying pulp from recycled newspapers
US5935383A (en) * 1996-12-04 1999-08-10 Kimberly-Clark Worldwide, Inc. Method for improved wet strength paper
US6387210B1 (en) 1998-09-30 2002-05-14 Kimberly-Clark Worldwide, Inc. Method of making sanitary paper product from coarse fibers
ATE382740T1 (de) 1999-03-31 2008-01-15 Fpinnovations Retentionsmittel enthaltend peo
US6090242A (en) * 1999-04-06 2000-07-18 Minerals Technologies Inc. Method of improvement strength of papers
US6287423B1 (en) * 1999-04-06 2001-09-11 Minerals Technologies Inc. Paper composition for improved sheet properties
US20020096275A1 (en) * 2000-08-07 2002-07-25 Erik Lindgren Sizing dispersion
US20020166648A1 (en) * 2000-08-07 2002-11-14 Sten Frolich Process for manufacturing paper
US20040104004A1 (en) * 2002-10-01 2004-06-03 Fredrik Solhage Cationised polysaccharide product
US20040138438A1 (en) * 2002-10-01 2004-07-15 Fredrik Solhage Cationised polysaccharide product
JP4777607B2 (ja) * 2003-10-14 2011-09-21 ソマール株式会社 紙用地合い向上剤及びこれを用いた製紙方法

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Cited By (17)

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US5755930A (en) * 1994-02-04 1998-05-26 Allied Colloids Limited Production of filled paper and compositions for use in this
US6048438A (en) * 1995-11-08 2000-04-11 Nalco Chemical Company Method to enhance the performance of polymers and copolymers of acrylamide as flocculants and retention aids
CN1088777C (zh) * 1996-02-13 2002-08-07 希巴特殊化学水处理有限公司 加填料纸的生产方法及其所用的组合物
AU716756B2 (en) * 1996-02-13 2000-03-09 Ciba Specialty Chemicals Water Treatments Limited Production of filled paper and compositions for use in this
WO1997030222A1 (fr) * 1996-02-13 1997-08-21 Allied Colloids Limited Production de papier charge et compositions utilisables dans ce papier
US6284099B1 (en) 1996-02-23 2001-09-04 Ciba Specialty Chemicals Water Treatments Limited Sizing of paper
WO1999002775A1 (fr) * 1997-07-07 1999-01-21 Kemira Kemi Ab Agent de retention
US6306256B1 (en) 1997-07-07 2001-10-23 Kemira Kemi Ab Retention agent
US6123856A (en) * 1998-01-09 2000-09-26 Ciba Specialty Chemicals Water Treatments Limited Dewatering of sludges
US6818100B2 (en) 2000-08-07 2004-11-16 Akzo Nobel N.V. Process for sizing paper
US6846384B2 (en) 2000-08-07 2005-01-25 Akzo Nobel N.V. Process for sizing paper
US6918995B2 (en) 2000-08-07 2005-07-19 Akzo Nobel N.V. Process for the production of paper
US7318881B2 (en) 2000-08-07 2008-01-15 Akzo Nobel N.V. Process for sizing paper
US7488402B2 (en) 2000-08-07 2009-02-10 Akzo Nobel N.V. Process for production of paper
US7303654B2 (en) 2002-11-19 2007-12-04 Akzo Nobel N.V. Cellulosic product and process for its production
US8425723B2 (en) 2007-04-05 2013-04-23 Akzo Nobel N.V. Process for improving optical properties of paper
EP2402503A1 (fr) 2010-06-30 2012-01-04 Akzo Nobel Chemicals International B.V. Procédé de production d'un produit cellulosique

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KR100346559B1 (ko) 2003-02-11
AU1583195A (en) 1995-08-21
EP0693146B1 (fr) 1998-12-23
BR9505772A (pt) 1996-02-27
NZ279258A (en) 1998-04-27
US5538596A (en) 1996-07-23
CA2159593A1 (fr) 1995-08-10
ES2125597T3 (es) 1999-03-01
ZA95924B (en) 1996-02-06
DK0693146T3 (da) 1999-08-23
NO953936L (no) 1995-10-03
NO953936D0 (no) 1995-10-03
JPH08508796A (ja) 1996-09-17
FI954677A (fi) 1995-10-02
FI954677A0 (fi) 1995-10-02
MX9504150A (es) 1997-06-28
PL180024B1 (en) 2000-12-29
GR3029339T3 (en) 1999-05-28
ATE174981T1 (de) 1999-01-15
PL310979A1 (en) 1996-01-22
CA2159593C (fr) 1999-10-26
DE69506799D1 (de) 1999-02-04
EP0693146A1 (fr) 1996-01-24
JP3681070B2 (ja) 2005-08-10
DE69506799T2 (de) 1999-05-20
AU701663B2 (en) 1999-02-04
NO319019B1 (no) 2005-06-06

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